. 5 90 92 94 96 98 100 Minimum Support (% of Database) Estimation Accuracy (%) small large 0.1 0.5 1 2 5 50 60 70 80 90 100 Minimum Support (% of Database) Pruning Efficiency (%) remaining tuple (new) remaining. Support (% of Database) Pruning Efficiency (%) remaining tuple (new) remaining tuple (old) pruning function